Figure 1a

Luminescence spectra of a blue LED at J = 0.15 mA( spectra are normalized at the maximum of the blue line); numbers at the curves are the hours of aging at J = 80 mA.

Figure 1b

Luminescence spectra of a green LED at J = 0.15 mA; numbers at the curves are hours of aging at J = 80 mA.

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© 1998 The Materials Research Society